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PdCo40W20: Enhanced Wear-Resistant Alloy for High-Performance Contact Applications

The palladium-cobalt-tungsten material PdCo40W20, also Pd40Co40W20 or 40Pd40Co20W, has satisfactory corrosion behavior but very good wear behavior. It is ductile and age-hardenable, as well as machinable. The palladium-cobalt-tungsten alloy is used as a contact material for sliding contacts and potentiometer wire and as a monolithic contact spring material.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

11.3 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

167 GPa

Elongation

20.0 °C

2 %

Hardness, Vickers

20.0 °C

540 [-]

Poisson's ratio

23.0 °C

0.39 [-]

Typical for Palladium

Shear modulus

20.0 °C

62 GPa

Tensile strength

20.0 °C

2000 MPa

Yield strength Rp0.2

20.0 °C

1980 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

300.0 °C

1.26E-5 1/K

Melting point

1553 °C

Typical for Palladium

Specific heat capacity

23.0 °C

236 - 248 J/(kg·K)

Typical for Palladium

Thermal conductivity

23.0 °C

60 - 76 W/(m·K)

Typical for Palladium

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

8.7E-7 Ω·m

Chemical properties

PropertyValue

Cobalt

40 %

Palladium

40 %

Tungsten

20 %


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